Stellar radiation refers to the energy emitted by stars, including our Sun. This energy travels through space in the form of electromagnetic waves, which include visible light, ultraviolet light, and infrared radiation. The intensity and type of radiation depend on the star's temperature and size, influencing the conditions of surrounding planets. The process of stellar radiation begins in a star's core, where nuclear fusion occurs, converting hydrogen into helium and releasing vast amounts of energy. This energy then moves outward, eventually reaching space and impacting celestial bodies like Earth and other planets in their respective solar systems.